1225422018 has 54 divisors (see below), whose sum is σ = 2741070969. Its totient is φ = 395651952.

The previous prime is 1225422017. The next prime is 1225422031. The reversal of 1225422018 is 8102245221.

1225422018 is a `hidden beast` number, since 1 + 225 + 422 + 0 + 18 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 988662249 + 236759769 = 31443^2 + 15387^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24753.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1225421982 and 1225422000.

It is not an unprimeable number, because it can be changed into a prime (1225422013) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5495055 + ... + 5495277.

Almost surely, 2^1225422018 is an apocalyptic number.

1225422018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225422018

1225422018 is an abundant number, since it is smaller than the sum of its proper divisors (1515648951).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225422018 is an equidigital number, since it uses as much as digits as its factorization.

1225422018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1225422018 is about 35006.0283094212. The cubic root of 1225422018 is about 1070.1103382882.

Adding to 1225422018 its reverse (8102245221), we get a palindrome (9327667239).

The spelling of 1225422018 in words is "one billion, two hundred twenty-five million, four hundred twenty-two thousand, eighteen".